*{padding:0;margin:0;}

a{
    color:lightgrey;
    text-decoration: none;
}

a:hover{
    color:#fff;
}

/*菜单CSS*/

.menu{
    position: absolute;
    z-index: 99;
}

/*Boot_1*/

.boot_1{
    height:55px;
    background:#202020;
    display:none;
    z-index:99;
}

.boot_1_menu{
    color:#fff;
    float:left;
    font-size:1.7em;
    margin:0.4em 0 0 0.5em;
}

.boot_1_tittle{
    width:80%;
    height:55px;
    font-size:1.4em;
    font-weight:600;
    text-align: center;
    position: absolute;
    right:2.8em;
    top:0.2em;
}

.boot_1_head img{
    width:3em;
    margin-top:2px;
    margin-right:10px;
    border-radius:50%;
    float:right;
}

.boot_2_head img{
    margin-top:10px;
}

/*Boot_2*/

.boot_2 {
    width:70px;
    height:100%;
    background:#202020;
    display:none;
    z-index:10;
    min-height:570px;
}

.boot_2_head {
    padding-top:1em;
    
}

.icon_set {
    width:16px;
   margin:10px 25px;
}

.icons {
    font-size:22px;
    margin-top:80px;
}

.icons ul li{
    margin-top:10px;
}

.icons1 {
    font-size:22px;
    margin-top:45px;
}

/*Boot_3*/

.boot_3 {
    width:300px;
    height:100%;
    background: #202020;
    display:none;
    position:absolute;
    min-height:720px;
}

.boot_4 {
    width:300px;
    height:100%;
    background: #202020;
    display:none;
    position:absolute;
}

.boot_3_head img{
    width:190px;
    margin:70px 55px 30px;
}

.boot_2_tittle {
    font-size:1.4em;
    text-align: center;
    font-weight:600;
}

.icon_conli {
    list-style: none;
    float:left;
    margin:20px 4px;
}

.icon_conlis {
    margin-top:10px;
    margin-left: 5px;
}

/*@media*/

@media screen and (min-width:1001px){
    
    .boot_1{
        display: none;
    }
    
    .boot_2{
        display: none;
    }
    
    .boot_3{
        display: block;
    }
    
    
}/*BIG-min300*/

@media screen and (max-width:1000px){
    
    .boot_1{
        display: none;
    }
    
    .boot_2{
        display: block;
    }
    
    .boot_3{
        display: none;
    }
    
}/*MEDIA-max299*/

@media screen and (max-width:800px){
    
    .boot_1{
        display: block;
    }
    
    .boot_2{
        display: none;
    }
    
    .boot_3{
        display: none;
    }
}/*SMALL max57*/

#but{
    width:100%;
    height:100%;
    position: fixed;
    z-index:11;
    display:none;
}